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52 lines
1.5 KiB
52 lines
1.5 KiB
#!/usr/bin/env python
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# This example demonstrates the use of vtkVectorText and vtkFollower.
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# vtkVectorText is used to create 3D annotation. vtkFollower is used to
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# position the 3D text and to ensure that the text always faces the
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# renderer's active camera (i.e., the text is always readable).
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import vtk
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# Create the axes and the associated mapper and actor.
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axes = vtk.vtkAxes()
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axes.SetOrigin(0, 0, 0)
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axesMapper = vtk.vtkPolyDataMapper()
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axesMapper.SetInputConnection(axes.GetOutputPort())
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axesActor = vtk.vtkActor()
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axesActor.SetMapper(axesMapper)
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# Create the 3D text and the associated mapper and follower (a type of
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# actor). Position the text so it is displayed over the origin of the
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# axes.
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atext = vtk.vtkVectorText()
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atext.SetText("Origin")
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textMapper = vtk.vtkPolyDataMapper()
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textMapper.SetInputConnection(atext.GetOutputPort())
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textActor = vtk.vtkFollower()
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textActor.SetMapper(textMapper)
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textActor.SetScale(0.2, 0.2, 0.2)
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textActor.AddPosition(0, -0.1, 0)
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# Create the Renderer, RenderWindow, and RenderWindowInteractor.
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ren = vtk.vtkRenderer()
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renWin = vtk.vtkRenderWindow()
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renWin.AddRenderer(ren)
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iren = vtk.vtkRenderWindowInteractor()
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iren.SetRenderWindow(renWin)
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# Add the actors to the renderer.
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ren.AddActor(axesActor)
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ren.AddActor(textActor)
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# Zoom in closer.
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ren.ResetCamera()
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ren.GetActiveCamera().Zoom(1.6)
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# Reset the clipping range of the camera; set the camera of the
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# follower; render.
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ren.ResetCameraClippingRange()
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textActor.SetCamera(ren.GetActiveCamera())
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iren.Initialize()
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renWin.Render()
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iren.Start()
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